--backup leaves window where file doesn't exist.

[Chris Shoemaker]

On Thu, Sep 15, 2005 at 08:45:00AM -0400, Dave Mielke wrote:
> When using --backup, the sequence (as monitored by strace) is:
> 
>    rename("/path/to/<file>", "<backup-dir>/<file><backup-suffix>")
>    rename("/path/to/.<file>.xxxxxx", "/path/to/<file>")
> 
> This, of course, leaves a momentary window wherein <file> can't be found. Might 
> it be possible to replace the first rename() with link() instead? This, of
> course, could only be done when the backup directory is on the same volume.

Good catch.  But what about when backup-dir is not on same filesystem
as original?  link will give EXDEV, I think.

-chris

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